<!DOCTYPE html>
<html lang="en">
    <head>
        <title>sessionStorage</title>
        <meta charset="UTF-8">
        <meta name="viewport" content="width=device-width, initial-scale=1">
        <link href="css/style.css" rel="stylesheet">
    </head>
    <body>
        <h2>sessionStorage</h2>
        <button onclick="saveData()">点我保存一个数据</button>
        <button onclick="readData()">点我读取一个数据</button>
        <button onclick="deleteData()">点我删除一个数据</button>
        <button onclick="deleteAll()">点我清空数据</button>
    </body>
    <script type="text/javascript">
    let p = {name:'张三',age:17}
        function saveData(){
            sessionStorage.setItem('msg','hello')
            sessionStorage.setItem('person',JSON.stringify(p))
            
        }
        function readData(){
            console.log(sessionStorage.getItem('msg'));
            const res= sessionStorage.getItem('person')
            console.log(JSON.parse(res));
        }
        function deleteData(){
            sessionStorage.removeItem('msg')
        }
        function deleteAll(){
            sessionStorage.clear()
        }
        
        
    </script>
</html>